Most people know that the words trilby and Svengali entered English as a result of George du Maurier's enormously successful novel of 1894 Trilby. Trilby was the heroine's surname, and in a stage production she wore a short-brimmed hat, which became very popular and was given the name trilby. Svengali was the villain of the book, who hypnotised Trilby into becoming a successful singer.
However, there are several other words and phrases in English that we have du Maurier, and his novel Trilby, to be thankful for. Trilby was an artist's model and at one point she says "I'm posing for Durien the sculptor, on the next floor. I pose to him for the altogether." Almost immediately in the altogether began to be used to mean 'naked'.
The first citations in the Oxford English Dictionary for bel canto (type of singing), blub (fit of weeping), charcutier (pork butcher), footle (as an adjective, trifling), and nounou (wet nurse) are also from Trilby.
George du Maurier was a cartoonist on the British satirical magazine Punch, and it was one of his cartoons in that publication that gave rise to the phrase like the curate's egg - good in parts, although he did not actually mention curate's egg as a lexical item at all in the cartoon (which can be viewed here).